/**
 * @file lv_port_fs_templ.c
 *
 */

/*Copy this file as "lv_port_fs.c" and set this value to "1" to enable content*/
#if 1

/*********************
 *      INCLUDES
 *********************/
#include "lv_port_fs_template.h"
#include "../../lvgl.h"
#include "img_info.h"
#include "sfud.h"
#include "w25qxx.h"

/*********************
 *      DEFINES
 *********************/

/**********************
 *      TYPEDEFS
 **********************/

/**********************
 *  STATIC PROTOTYPES
 **********************/
static void fs_init(void);

static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode);
static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p);
static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br);
static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw);
static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence);
static lv_fs_res_t fs_size(lv_fs_drv_t * drv, void * file_p, uint32_t * size_p);
static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p);

static void * fs_dir_open(lv_fs_drv_t * drv, const char * path);
static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * rddir_p, char * fn);
static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * rddir_p);

/**********************
 *  STATIC VARIABLES
 **********************/

/**********************
 * GLOBAL PROTOTYPES
 **********************/

/**********************
 *      MACROS
 **********************/

/**********************
 *   GLOBAL FUNCTIONS
 **********************/

void lv_port_fs_init(void)
{
    /*----------------------------------------------------
     * Initialize your storage device and File System
     * -------------------------------------------------*/
    fs_init();

    /*---------------------------------------------------
     * Register the file system interface in LVGL
     *--------------------------------------------------*/

    /*Add a simple drive to open images*/
    static lv_fs_drv_t fs_drv;
    lv_fs_drv_init(&fs_drv);


    /*Set up fields...*/
    fs_drv.letter = 'P';                    // P盘，表示路径以"P:"开头的文件交给你处理
    fs_drv.open_cb = fs_open;               // 主要是打开文件，返回文件句柄(告诉LVGL哪个是你要读的文件)
    fs_drv.close_cb = fs_close;             // 主要是关闭文件，释放文件句柄(告诉LVGL你不要用这个文件了)
    fs_drv.read_cb = fs_read;               //LVGL 想读取数据，它就会自动调用这个函数。
    fs_drv.write_cb = fs_write;             //LVGL 想写入数据，它就会自动调用这个函数。
    fs_drv.seek_cb = fs_seek;               //LVGL 想定位文件，它就会自动调用这个函数。
    fs_drv.tell_cb = fs_tell;               //LVGL 想知道文件当前位置，它就会自动调用这个函数。

    // fs_drv.dir_close_cb = fs_dir_close;     //LVGL 想关闭目录，它就会自动调用这个函数。
    // fs_drv.dir_open_cb = fs_dir_open;       //LVGL 想打开目录，它就会自动调用这个函数。
    // fs_drv.dir_read_cb = fs_dir_read;       //LVGL 想读取目录下的文件，它就会自动调用这个函数。

    lv_fs_drv_register(&fs_drv);
}

/**********************
 *   STATIC FUNCTIONS
 **********************/

/*Initialize your Storage device and File system.*/
static void fs_init(void)
{
    /*E.g. for FatFS initialize the SD card and FatFS itself*/

    /*You code here*/
}

/**
 * Open a file
 * @param drv       pointer to a driver where this function belongs
 * @param path      path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
 * @param mode      read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
 * @return          a file descriptor or NULL on error
 */
static void * fs_open(lv_fs_drv_t * drv, const char * path, lv_fs_mode_t mode)
{

    static img_instance_t *fs_img = NULL;
    printf("open img :%s\n",path);
    if(mode == LV_FS_MODE_WR) {

    }
    else if(mode == LV_FS_MODE_RD) {
        fs_img = get_img_instance_by_name((char *)path);
        fs_img ->pos = 0 ;
        printf("obj name :%s\n",fs_img->name);
        printf("obj addr :0x%x\n",fs_img->addr);
        printf("obj len  :0x%x\n",fs_img->len);
    }
    else if(mode == (LV_FS_MODE_WR | LV_FS_MODE_RD)) {

    }
    return fs_img;

}

/**
 * Close an opened file
 * @param drv       pointer to a driver where this function belongs
 * @param file_p    pointer to a file_t variable. (opened with fs_open)
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_close(lv_fs_drv_t * drv, void * file_p)
{
    lv_fs_res_t res = LV_FS_RES_OK;
    if(file_p == NULL)
    {
        return LV_FS_RES_NOT_IMP;
    }
    img_instance_t *fs_img = (img_instance_t *)file_p;
    fs_img = NULL;
    (void) fs_img ;
    /*Add your code here*/

    return res;
}

/**
 * Read data from an opened file
 * @param drv       pointer to a driver where this function belongs
 * @param file_p    pointer to a file_t variable.
 * @param buf       pointer to a memory block where to store the read data
 * @param btr       number of Bytes To Read
 * @param br        the real number of read bytes (Byte Read)
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_read(lv_fs_drv_t * drv, void * file_p, void * buf, uint32_t btr, uint32_t * br)
{

    sfud_err result;
    lv_fs_res_t res = LV_FS_RES_NOT_IMP;

    // const sfud_flash *flash = sfud_get_device_table() + 0;

    if(file_p == NULL)
    {
        printf("fs_read error!");
        return LV_FS_RES_NOT_IMP;
    }
    img_instance_t *fs_img = (img_instance_t *)file_p;
    uint32_t size = (btr > (fs_img->len - fs_img->pos)) ? (fs_img->len - fs_img->pos) : btr;
    printf("read :%s addr:0x%x,len:%d",fs_img->name,fs_img->addr + fs_img->pos,size);
    #if 1
    // mod_param_read_img(fs_img->addr + fs_img->pos,buf,size);
    result = sfud_read(sfud_get_device(SFUD_W25Q128_DEVICE_INDEX), fs_img->addr + fs_img->pos, size, buf);
    if (result != SFUD_SUCCESS) {
        // 这里可以打印错误或处理异常
        printf("Flash read error! addr = 0x%08X, len = %d\n", fs_img->addr + fs_img->pos, size);
    } else {
        printf("read:%s     addr:0x%08X,    len:%d\n",fs_img->name,fs_img->addr + fs_img->pos,size);
    }

    #else


    W25QXX_Read(buf, fs_img->addr + fs_img->pos, size);
    printf("read:%s     addr:0x%08X,    len:%d\n",fs_img->name,fs_img->addr + fs_img->pos,size);
    #endif
    *br = size;
    fs_img->pos += size;
    /*Add your code here*/
    res = LV_FS_RES_OK;
    return res;
}

/**
 * Write into a file
 * @param drv       pointer to a driver where this function belongs
 * @param file_p    pointer to a file_t variable
 * @param buf       pointer to a buffer with the bytes to write
 * @param btw       Bytes To Write
 * @param bw        the number of real written bytes (Bytes Written). NULL if unused.
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_write(lv_fs_drv_t * drv, void * file_p, const void * buf, uint32_t btw, uint32_t * bw)
{
    lv_fs_res_t res = LV_FS_RES_NOT_IMP;

    /*Add your code here*/

    return res;
}

/**
 * Set the read write pointer. Also expand the file size if necessary.
 * @param drv       pointer to a driver where this function belongs
 * @param file_p    pointer to a file_t variable. (opened with fs_open )
 * @param pos       the new position of read write pointer
 * @param whence    tells from where to interpret the `pos`. See @lv_fs_whence_t
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_seek(lv_fs_drv_t * drv, void * file_p, uint32_t pos, lv_fs_whence_t whence)
{
    lv_fs_res_t res = LV_FS_RES_OK;
    if(file_p == NULL)
    {
        return LV_FS_RES_NOT_IMP;
    }
    img_instance_t *fs_img = (img_instance_t *)file_p;

    switch (whence)
    {
    case LV_FS_SEEK_SET:
        fs_img->pos = pos;
        break;
    case LV_FS_SEEK_CUR:
        fs_img->pos += pos;
        break;
    case LV_FS_SEEK_END:
        fs_img->pos = fs_img->len;
        break;
    default:
        break;
    }
    /*Add your code here*/

    return res;
}
/**
 * Give the position of the read write pointer
 * @param drv       pointer to a driver where this function belongs
 * @param file_p    pointer to a file_t variable.
 * @param pos_p     pointer to to store the result
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_tell(lv_fs_drv_t * drv, void * file_p, uint32_t * pos_p)
{
    lv_fs_res_t res = LV_FS_RES_OK;

    if(file_p == NULL)
    {
        return LV_FS_RES_NOT_IMP;
    }
    img_instance_t *fs_img = (img_instance_t *)file_p;
    *pos_p = fs_img->pos;
    /*Add your code here*/

    return res;
}

/**
 * Initialize a 'lv_fs_dir_t' variable for directory reading
 * @param drv       pointer to a driver where this function belongs
 * @param path      path to a directory
 * @return          pointer to the directory read descriptor or NULL on error
 */
static void * fs_dir_open(lv_fs_drv_t * drv, const char * path)
{
//    void * dir = NULL;
//    /*Add your code here*/
//    dir = ...           /*Add your code here*/
//          return dir;
}

/**
 * Read the next filename form a directory.
 * The name of the directories will begin with '/'
 * @param drv       pointer to a driver where this function belongs
 * @param rddir_p   pointer to an initialized 'lv_fs_dir_t' variable
 * @param fn        pointer to a buffer to store the filename
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_dir_read(lv_fs_drv_t * drv, void * rddir_p, char * fn)
{
    lv_fs_res_t res = LV_FS_RES_NOT_IMP;

    /*Add your code here*/

    return res;
}

/**
 * Close the directory reading
 * @param drv       pointer to a driver where this function belongs
 * @param rddir_p   pointer to an initialized 'lv_fs_dir_t' variable
 * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
 */
static lv_fs_res_t fs_dir_close(lv_fs_drv_t * drv, void * rddir_p)
{
    lv_fs_res_t res = LV_FS_RES_NOT_IMP;

    /*Add your code here*/

    return res;
}

#else /*Enable this file at the top*/

/*This dummy typedef exists purely to silence -Wpedantic.*/
typedef int keep_pedantic_happy;
#endif
